Tested :

- Configure the linked attributes plug-in (attributes themselves don't matter).

ldapmodify -x -h localhost -D "cn=directory manager" -w xxxxx -p 389 << EOF
dn: cn=Linked Attributes,cn=plugins,cn=config
changetype: modify
replace: nsslapd-pluginEnabled
nsslapd-pluginEnabled: on


- Enable the memberOf plug-in.

ldapmodify -x -h localhost -D "cn=directory manager" -w xxxxxx -p 389 << EOF
dn: cn=MemberOf Plugin,cn=plugins,cn=config
changetype: modify
replace: nsslapd-pluginEnabled
nsslapd-pluginEnabled: on

ldapmodify -x -h localhost -D "cn=directory manager" -w xxxxxxxx -p 389 << EOF
dn: cn=MemberOf Plugin,cn=plugins,cn=config
changetype: modify
replace: memberofattr
memberofattr: memberOf

ldapmodify -x -h localhost -D "cn=directory manager" -w xxxxxx -p 389 << EOF
dn: cn=MemberOf Plugin,cn=plugins,cn=config
changetype: modify
replace: memberofgroupattr
memberofgroupattr: uniqueMember

service dirsrv restart

- Import a sizeable database with many group memberships. 100 group entries
with 5000 users should be sufficient if you have some of the groups have many
members and have some groups be members of other groups (nested grouping).

- Run the fixup-memberof.pl script to fire of a fixup task on the entire
database, then immediately run 'service dirsrv stop'.

/usr/lib64/dirsrv/slapd-rheltest/fixup-memberof.pl -v -D "cn=Directory Manager"
-w xxxxx -b "ou=unix,dc=corp,dc=example,dc=com"

No Crash found.

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
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    New Contents:
Starting a long running task in the server (using the cn=tasks,cn=config interface), then shutting down the server before the task can complete, caused the server to crash. This update prevents the server from crashing, but does not gracefully terminate the task, which can leave the server database in an inconsistent state. For example, the fixup-memberof.pl script invokes a tasks to fix up the memberOf attribute in group member entries. If the server is shut down before the task can complete, some entries may not have the correct memberOf values. The user should ensure that the task is complete before shutting down the server to avoid inconsistency.

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0824.html